Motor controller, electric driving device, electric driving system and electric equipment

Abstract

The utility model belongs to the technical field of electric driving, and provides a motor controller, an electric driving device, an electric driving system and electric equipment.The motor controller comprises a first power module, a bus capacitor and a direct-current connection assembly, and the direct-current connection assembly comprises a conductive body and an absorption capacitor; the conductive body is electrically connected between the first power module and the bus capacitor, and the absorption capacitor is electrically connected with the conductive body. According to the motor controller provided by the invention, the absorption capacitor is electrically connected with the conductive main body, and the absorption capacitor can absorb at least part of high pulse voltage generated by the conductive main body in the process that the conductive main body transmits direct current, so that stray inductance and lead inductance on the conductive main body are reduced; the conductive performance of the direct current connection assembly is effectively improved, so that the performance of the motor controller is effectively improved, and the performance of the electric driving device is effectively improved.

Description

Technical Field

[0001] This application belongs to the technical field of electric drive, and more specifically, relates to a motor controller, an electric drive device, an electric drive system, and an electric device. Background Art

[0002] With the increasing environmental pollution, new energy vehicles are becoming more and more popular among people. As the power device of new energy vehicles, the electric drive device is used to convert the electrical energy provided by the battery into mechanical energy to drive the new energy vehicle to travel. In the development process of new energy technology, how to improve the performance of the electric drive device is an urgent technical problem in new energy technology. Summary of the Utility Model

[0003] The purpose of the embodiments of this application is to provide a motor controller, an electric drive device, an electric drive system, and an electric device, so as to solve the technical problem of poor performance of the electric drive device in related technologies.

[0004] To achieve the above purpose, the technical solution adopted in the embodiments of this application is: providing a motor controller, including:

[0005] A first power module;

[0006] A bus capacitor;

[0007] A DC connection component, including a conductive body and an absorption capacitor, the conductive body is electrically connected between the first power module and the bus capacitor, and the absorption capacitor is electrically connected to the conductive body.

[0008] The motor controller provided by the embodiments of this application has at least the following beneficial effects: The motor controller provided by the embodiments of this application electrically connects the absorption capacitor to the conductive body. During the process of the conductive body transmitting DC current, the absorption capacitor can absorb at least part of the high pulse voltage generated by the conductive body, so as to reduce the stray inductance and lead inductance on the conductive body, effectively improve the conductive performance of the DC connection component, thereby effectively improving the performance of the motor controller, and further effectively improving the performance of the electric drive device.

[0009] In some embodiments of this application, the conductive body includes a first electrode member and a second electrode member with opposite polarities, the absorption capacitor includes a first pin with the same polarity as the first electrode member and a second pin with the same polarity as the second electrode member, the first pin is electrically connected to the first electrode member, and the second pin is electrically connected to the second electrode member.

[0010] By adopting the above technical solution, it is convenient to electrically connect the conductive body and the absorption capacitor.

[0011] In some embodiments of this application, the first electrode member and the second electrode member are separated and stacked.

[0012] By adopting the above technical solution, the structure of the direct current connection component can be made more compact, effectively improving the utilization rate of the internal space of the motor controller, thereby effectively reducing the volume of the motor controller, which is beneficial to optimizing the overall layout structure of the electric drive device.

[0013] In some embodiments of the present application, the first electrode member has a first connection surface, the first pin is connected to the first connection surface, the second electrode member has a second connection surface, the second pin is connected to the second connection surface, and the first connection surface and the second connection surface are in the same plane.

[0014] By adopting the above technical solution, the requirement for flatness of the absorption capacitor can be met, so that the forces on the first pin and the second pin become more balanced, effectively improving the stability of the connection between the absorption capacitor and the conductive body, thereby effectively improving the working reliability of the direct current connection component.

[0015] In some embodiments of the present application, the first electrode member is provided with a first boss, the first connection surface is arranged on the first boss, the second electrode member is provided with a second boss, and the second connection surface is arranged on the second boss.

[0016] By adopting the above technical solution, during the manufacturing process of the conductive body, the heights of the first connection surface and the second connection surface can be adjusted by adjusting the heights of the first boss and the second boss, which is convenient for arranging the first connection surface and the second connection surface in the same plane.

[0017] In some embodiments of the present application, the direct current connection component further includes a circuit board, a first conductive terminal, and a second conductive terminal. The absorption capacitor is fixedly arranged on the circuit board, the first conductive terminal is electrically connected between the first electrode member and the first pin, and the second conductive terminal is electrically connected between the second electrode member and the second pin.

[0018] By adopting the above technical solution, it is convenient to electrically connect the conductive body and the absorption capacitor. Moreover, since the circuit board has good flatness, the requirement for flatness of the absorption capacitor can be met, so that the forces on the first pin and the second pin become more balanced, effectively reducing the risk of open circuit in the electrical connection path between the conductive body and the absorption capacitor, thereby effectively improving the working reliability of the direct current connection component.

[0019] In some embodiments of the present application, the direct current connection component further includes an insulating member, and the insulating member covers at least a part of the conductive body.

[0020] By adopting the above technical solution, the conductive body can be insulated and separated from other conductive components, effectively reducing the risk of short circuit in the motor controller, thereby effectively improving the working reliability of the motor controller.

[0021] In some embodiments of the present application, the insulating member has a first cavity, and the absorption capacitor is disposed in the first cavity.

[0022] By adopting the above technical solution, not only the position of the absorption capacitor is effectively restricted, but also the absorption capacitor can be protected, reducing the risk of collision between the absorption capacitor and other components, thereby effectively improving the working reliability of the DC electrical connector.

[0023] In some embodiments of the present application, the insulating member includes an insulating main body and a retaining edge. The insulating main body covers at least part of the conductive main body, and the retaining edge is disposed on the insulating main body and defines the first cavity.

[0024] By adopting the above technical solution, it is convenient to form the first cavity on the insulating member.

[0025] In some embodiments of the present application, the insulating member is provided with a first through hole, and the absorption capacitor passes through the first through hole to be electrically connected to the conductive main body.

[0026] By adopting the above technical solution, it is convenient for the conductive main body to be electrically connected to the absorption capacitor.

[0027] In some embodiments of the present application, the edge of the port of the first through hole away from the conductive main body has a chamfer structure.

[0028] By adopting the above technical solution, it is convenient to assemble the absorption capacitor into the first through hole, effectively improving the assembly efficiency of the DC electrical connection component.

[0029] In some embodiments of the present application, the absorption capacitor includes a core body, and the DC electrical connection component further includes a thermal conductive adhesive. The thermal conductive adhesive covers at least part of the core body and is connected to the conductive main body.

[0030] By adopting the above technical solution, the heat generated by the core body can be transferred to the conductive main body through the thermal conductive adhesive, effectively improving the heat dissipation efficiency of the core body, thereby effectively improving the working reliability of the DC electrical connection component.

[0031] In some embodiments of the present application, the absorption capacitor includes a core body, and the DC electrical connection component further includes a first heat conducting member. The first heat conducting member includes a first heat conducting portion and a second heat conducting portion that are thermally connected. The first heat conducting portion is thermally connected to the core body, and the second heat conducting portion is thermally connected to the conductive main body.

[0032] By adopting the above technical solution, at least part of the heat generated by the core body can be transferred to the conductive main body through the first heat conducting member, effectively improving the heat dissipation efficiency of the core body, thereby effectively improving the working reliability of the DC electrical connection component.

[0033] In some embodiments of the present application, the direct current connection assembly further includes a first insulating heat-conducting pad, which is disposed between the first heat-conducting portion and the core body to conductively connect the first heat-conducting portion and the core body and insulatively separate them.

[0034] By adopting the above technical solution, it is not only convenient to conductively connect the first heat-conducting portion and the core body, but also can reduce the risk of short circuit between the first heat-conducting portion and the core body, thereby further improving the working reliability of the direct current connection assembly.

[0035] In some embodiments of the present application, the direct current connection assembly further includes a second heat-conducting member, which includes a third heat-conducting portion and a fourth heat-conducting portion that are conductively connected to each other. The first heat-conducting portion is conductively connected to one side of the core body, the third heat-conducting portion is conductively connected to the other side of the core body, and the fourth heat-conducting portion is conductively connected to the conductive body.

[0036] By adopting the above technical solution, at least part of the heat generated by the core body can be transferred to the conductive body through the first heat-conducting member, and at least another part of the heat generated by the core body can be transferred to the conductive body through the second heat-conducting member, further improving the heat dissipation efficiency of the core body, thereby further improving the working reliability of the direct current connection assembly.

[0037] In some embodiments of the present application, the direct current connection assembly further includes a second insulating heat-conducting pad, which is disposed between the third heat-conducting portion and the core body to conductively connect the third heat-conducting portion and the core body and insulatively separate them.

[0038] By adopting the above technical solution, it is not only convenient to conductively connect the third heat-conducting portion and the core body, but also can reduce the risk of short circuit between the third heat-conducting portion and the core body, thereby further improving the working reliability of the direct current connection assembly.

[0039] In some embodiments of the present application, the direct current connection assembly further includes a third insulating heat-conducting pad, which is disposed between the core body and the conductive body to conductively connect the core body and the conductive body and insulatively separate them.

[0040] By adopting the above technical solution, at least part of the heat generated by the core body can be transferred to the conductive body through the third insulating heat-conducting pad, further improving the heat dissipation efficiency of the core body, and the risk of short circuit between the conductive body and the core body can be reduced, thereby further improving the working reliability of the direct current connection assembly.

[0041] In some embodiments of the present application, the conductive body includes three-phase first direct current output terminals, and each phase of the first direct current output terminals is electrically connected to at least one absorption capacitor.

[0042] By adopting the above technical solution, the DC currents output by the three-phase first DC output terminals can be balanced with each other, thereby further improving the performance of the motor controller.

[0043] In some embodiments of the present application, the motor controller further includes a second power module. The conductive body includes a first DC output terminal and a second DC output terminal. The first DC output terminal is electrically connected to the first power module, and the second DC output terminal is electrically connected to the second power module.

[0044] By adopting the above technical solution, the first power module and the second power module can share a DC electrical connection component, effectively reducing the number of components of the motor controller, making the structure of the motor controller more compact, and thus effectively reducing the volume of the motor controller.

[0045] In some embodiments of the present application, the conductive body includes three-phase first DC output terminals and three-phase second DC output terminals. Each phase of the first DC output terminals is electrically connected to at least one absorption capacitor, and each phase of the second DC output terminals is electrically connected to at least another absorption capacitor.

[0046] By adopting the above technical solution, the DC currents output by the three-phase first DC output terminals and the DC currents output by the three-phase second DC output terminals can be balanced with each other, thereby further improving the performance of the motor controller.

[0047] In some embodiments of the present application, the first power module and the second power module are arranged side by side in a first direction. The DC electrical connection component is arranged between the first power module and the second power module, and the first direction is perpendicular to the height direction of the motor controller.

[0048] By adopting the above technical solution, the height dimension of the motor controller is effectively reduced, making the structure of the motor controller more compact, which is beneficial to optimizing the overall layout structure of the electric drive device.

[0049] The embodiment of the present application also provides an electric drive device, including a first motor and the motor controller according to any one of the above embodiments. The first power module is electrically connected to the first motor.

[0050] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: Since the electric drive device provided by the embodiment of the present application adopts the motor controller according to any one of the above embodiments, the performance of the electric drive device is effectively improved.

[0051] The embodiment of the present application also provides an electric drive device, including a first motor, a second motor and the motor controller according to any one of the above embodiments. The first power module is electrically connected to the first motor, and the second power module is electrically connected to the second motor.

[0052] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: Since the motor controller described in any one of the above embodiments is adopted, the performance of the electric drive device is effectively improved.

[0053] The embodiment of the present application also provides an electric drive system, including a battery and the electric drive device described in any one of the above embodiments, and the battery is electrically connected to the electric drive device.

[0054] The electric drive system provided by the embodiment of the present application has at least the following beneficial effects: Since the electric drive device described in any one of the above embodiments is adopted, the performance of the electric drive system is effectively improved.

[0055] The embodiment of the present application also provides an electric device, including the above electric drive system.

[0056] The electric device provided by the embodiment of the present application has at least the following beneficial effects: Since the electric drive system described in any one of the above embodiments is adopted, the performance of the electric device is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0058] Figure 1 It is a schematic structural diagram of a vehicle provided by the embodiment of the present application;

[0059] Figure 2 It is an exploded structural diagram of a battery provided by the embodiment of the present application;

[0060] Figure 3 It is a schematic structural diagram of an electric drive device provided by the embodiment of the present application;

[0061] Figure 4 It is a schematic structural diagram of a motor controller provided by the embodiment of the present application;

[0062] Figure 5 For Figure 4 The exploded structural diagram of the motor controller shown;

[0063] Figure 6 For Figure 4 The left view structural diagram of the motor controller shown;

[0064] Figure 7 ForFigure 6 Schematic cross-sectional structure diagram of the motor controller shown along the A-A line;

[0065] Figure 8 Schematic structure diagram of the DC connection component provided by an embodiment of the present application;

[0066] Figure 9 is Figure 8 Schematic structure diagram of the DC connection component shown after removing the insulating part and thermal conductive adhesive;

[0067] Figure 10 is Figure 8 Schematic structure diagram of the insulating part in the DC connection component shown;

[0068] Figure 11 is Figure 10 Enlarged schematic structure diagram of the B part of the insulating part shown;

[0069] Figure 12 is Figure 8 Left view schematic structure diagram of the DC connection component shown;

[0070] Figure 13 is Figure 12 Schematic cross-sectional structure diagram of the DC connection component shown along the C-C line;

[0071] Figure 14 Schematic structure diagram of the DC connection component provided by another embodiment of the present application;

[0072] Figure 15 is Figure 14 Schematic structure diagram of the first heat-conducting part in the DC connection component shown;

[0073] Figure 16 is Figure 14 Schematic structure diagram of the second heat-conducting part in the DC connection component shown;

[0074] Figure 17 is Figure 14 Left view schematic structure diagram of the DC connection component shown;

[0075] Figure 18 is Figure 17 Schematic cross-sectional structure diagram of the DC connection component shown along the D-D line;

[0076] Figure 19 Schematic structure diagram of the DC connection component provided by yet another embodiment of the present application;

[0077] Figure 20 Schematic structure diagram of the DC connection component provided by still another embodiment of the present application.

[0078] Among them, the reference numerals in the figures are as follows:

[0079] 1. Electric drive system;

[0080] 10. Electric drive device;

[0081] 11. Motor controller; 111. First power module; 1111. Second DC input terminal; 112. Bus capacitor; 1121. Third DC output terminal; 113. DC connection component; 1131. Conductive body; 11311. First electrode member; 11312. Second electrode member; 11313. First DC output terminal; 11314. Second DC output terminal; 11315. First connection surface; 11316. Second connection surface; 11317. First boss; 11318. Second boss; 11319. First DC input terminal; 1132. Absorption capacitor; 11321. Core body; 11322. First pin; 11323. Second pin; 1133. Insulating member; 11331. Insulating main body; 11332. Baffle; 11333. First cavity; 11334. First via hole; 11335. Chamfer structure; 1134. Thermal conductive adhesive; 1135. First heat conducting member; 11351. First heat conducting part; 11352. Second heat conducting part; 11353. First connecting part; 1136a. First insulating heat conducting pad; 1136b. Second insulating heat conducting pad; 1136c. Third insulating heat conducting pad; 1137. Second heat conducting member; 11371. Third heat conducting part; 11372. Fourth heat conducting part; 11373. Second connecting part; 1138. Circuit board; 1139a. First conductive terminal; 1139b. Second conductive terminal; 114. Second power module; 1141. Third DC input terminal; 115. Bus electrical connection component; 116. First AC connection component; 117. Second AC connection component; 118. Box body; 1181. Second cavity; 1182. Third cavity; 119. Control module;

[0082] 12. First motor;

[0083] 13. Second motor;

[0084] 20. Battery;

[0085] 21. Battery box; 211. First part; 212. Second part;

[0086] 22. Battery cell;

[0087] 2. Vehicle body. Detailed implementation manners

[0088] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0089] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0090] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0091] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0092] An electric drive device is a device for converting electrical energy into mechanical energy. The electric drive device generally includes a motor and a motor controller. The motor controller is used to convert direct current into alternating current and transmit the alternating current to the motor to drive the motor to operate. The motor controller can also be used to control the operation of the motor, such as controlling the rotational speed of the motor.

[0093] In the related art, the motor controller includes a power module, a bus capacitor and a direct current connection component. The bus capacitor is electrically connected to the external wire harness through a bus electrical connector. The direct current is transmitted to the bus capacitor through the external wire harness and the bus electrical connector. The bus capacitor can absorb the high pulse voltage generated by the bus electrical connector and the external wire harness. One end of the direct current connection component is electrically connected to the direct current input end of the power module, and the other end of the direct current connection component is electrically connected to the direct current output end of the bus capacitor to transmit the direct current to the power module. The power module is used to convert direct current into alternating current.

[0094] However, during the process of transmitting direct current, the direct current connection component will also generate high pulse voltage, which increases the stray inductance and lead inductance on the direct current connection component, reduces the conductivity, and causes the performance of the motor controller to decline accordingly, which is not conducive to improving the performance of the electric drive device.

[0095] To improve the performance of the electric drive device, the motor controller provided in the embodiment of the present application electrically connects an absorption capacitor to the conductive body. During the process of the conductive body transmitting direct current, the absorption capacitor can absorb at least part of the high pulse voltage generated by the conductive body, so as to reduce the stray inductance and lead inductance on the conductive body, effectively improve the conductivity of the direct current connection component, thereby effectively improving the performance of the motor controller, and further effectively improving the performance of the electric drive device.

[0096] The technical solutions described in the embodiments of the present application are applicable to electric drive devices and electric equipment using electric drive devices. Among them, the electric equipment can be, but is not limited to, vehicles, ships, spacecrafts, electric toys, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc. The spacecraft includes airplanes, rockets, space shuttles, spaceships, etc. The electric toys include fixed or mobile electric toys, such as electric vehicle toys, electric ship toys, electric airplane toys, etc.

[0097] For the convenience of description, the following embodiments take a vehicle as an example of an electric equipment in an embodiment of the present application for illustration.

[0098] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle provided in the embodiment of the present application. The vehicle includes a vehicle body 2, a battery 20, and an electric drive device 10. The vehicle body 2 is the main supporting component of the vehicle. The vehicle body 2 has an engine compartment and a passenger compartment. Among them, the engine compartment is used to accommodate the electric drive device 10, and the passenger compartment is used to provide an operating space and a riding space for the passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is arranged at the head of the vehicle body 2, that is, the engine compartment is the front engine compartment; when the vehicle is a rear-wheel drive vehicle, the engine compartment is arranged at the tail of the vehicle body 2, that is, the engine compartment is the rear engine compartment; when the vehicle is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment. The front engine compartment is arranged at the head of the vehicle body 2, and the rear engine compartment is arranged at the tail of the vehicle body 2. The number of the electric drive devices 10 can be two, and the two electric drive devices 10 are respectively arranged in the front engine compartment and the rear engine compartment. The battery 20 and the electric drive device 10 together form the electric drive system 1 of the vehicle. The battery 20 can be arranged at the bottom, the head or the tail of the vehicle. The battery 20 can be used to supply power to the electric drive device 10 to drive the electric drive device 10 to operate. The electric drive device 10 is used to convert the electric energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle to travel.

[0099] Please refer to Figure 2 , Figure 2 which is an explosion schematic diagram of the battery 20 provided by an embodiment of the present application. The battery 20 includes a battery box 21 and battery cells 22, and the battery cells 22 are accommodated in the battery box 21. Among them, the battery box 21 is used to provide an accommodation space for the battery cells 22, and the battery box 21 can adopt various structures. In some embodiments, the battery box 21 may include a first part 211 and a second part 212, the first part 211 and the second part 212 are covered with each other, and the first part 211 and the second part 212 jointly define an accommodation space for accommodating the battery cells 22. The second part 212 may be a hollow structure with one end open, the first part 211 may be a plate-like structure, and the first part 211 is covered on the open side of the second part 212 so that the first part 211 and the second part 212 jointly define an accommodation space; the first part 211 and the second part 212 may also both be hollow structures with one side open, and the open side of the first part 211 is covered on the open side of the second part 212 so that the first part 211 and the second part 212 jointly define an accommodation space. Of course, the battery box 21 formed by the first part 211 and the second part 212 may be in various shapes, such as a cylinder, a cuboid, etc., which are not specifically limited herein.

[0100] In some embodiments, the battery box 21 may be a part of the chassis structure of a vehicle. For example, a part of the battery box 21 may become at least a part of the floor of the vehicle, or a part of the battery box 21 may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0101] Of course, in some embodiments, the battery 20 may not include the battery box 21, but instead electrically connect a plurality of battery cells 22, and form an integral body through necessary fixing structures and then assemble it into a vehicle.

[0102] In the battery 20, there may be a plurality of battery cells 22, and the plurality of battery cells 22 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the plurality of battery cells 22. The plurality of battery cells 22 may be directly connected in series, in parallel, or in a hybrid connection together, and then the whole formed by the plurality of battery cells 22 is accommodated in the battery box 21. Of course, the battery 20 may also be that a plurality of battery cells 22 are first connected in series, in parallel, or in a hybrid connection to form battery modules, and then the plurality of battery modules are connected in series, in parallel, or in a hybrid connection to form an integral body and are accommodated in the battery box 21. The battery 20 may further include other functional components. For example, the battery 20 may further include a busbar for realizing electrical connection among the plurality of battery cells 22.

[0103] Among them, each battery cell 22 can be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can activate the active material through charging after discharging, and a primary battery cell refers to a battery cell 22 that cannot activate the active material through charging after the electrical energy is exhausted. The battery cell 22 can also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium-metal battery cell, a sodium-metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal-prismatic battery cell, etc., and there is no special limitation in this application.

[0104] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the electric drive device 10 provided by an embodiment of the present application. The electric drive device 10 includes a first motor 12 and a motor controller 11. The first motor 12 is used to convert the electrical energy provided by the battery 20 into mechanical energy. The first motor 12 can be, but is not limited to, an axial-flux motor, a radial-flux motor, a servo motor, a brushed motor, a brushless motor, etc. The electric drive device 10 can also include a second motor 13, and the second motor 13 is used to convert the electrical energy provided by the battery 20 into mechanical energy. The second motor 13 can be, but is not limited to, an axial-flux motor, a radial-flux motor, a servo motor, a brushed motor, a brushless motor, etc. During the operation of the electric drive device 10, the rotational speeds of the first motor 12 and the second motor 13 can be the same, or the rotational speeds of the first motor 12 and the second motor 13 can also be different.

[0105] In some embodiments, the rotating shafts of the first motor 12 and the second motor 13 are parallel to each other. The first motor 12 can be coaxially arranged with the second motor 13, that is, the central axes of the first motor 12 and the second motor 13 coincide. The "central axis" of the motor refers to the axial center line of the rotating shaft (or "rotor shaft") of the motor. As an example, the rotating shaft of the first motor 12 is connected to one of the left front wheel and the right front wheel of the vehicle, and the rotating shaft of the second motor 13 is connected to the other of the left front wheel and the right front wheel of the vehicle, or the rotating shaft of the first motor 12 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the rotating shaft of the second motor 13 is connected to the other of the left rear wheel and the right rear wheel of the vehicle.

[0106] Of course, in other embodiments, the first motor 12 may also be arranged non-coaxially with the second motor 13, that is, the central axis of the second motor 13 is spaced from the central axis of the first motor 12 in any direction perpendicular to the central axis of the first motor 12.

[0107] The motor controller 11 is configured to convert the direct current output by the battery 20 into alternating current and deliver the alternating current to the first motor 12 and the second motor 13. The motor controller 11 may also be configured to control the operation of the first motor 12 and the second motor 13. For example, the motor controller 11 is configured to control the start / stop, speed, torque, etc. of the first motor 12 and the second motor 13. In other words, the first motor 12, the second motor 13, and the battery 20 are electrically connected to the motor controller 11. The direct current output by the battery 20 can be delivered to the motor controller 11 through the current transmission path between the battery 20 and the motor controller 11. After the motor controller 11 converts the direct current into alternating current, the alternating current can be delivered to the first motor 12 and the second motor 13 through the current transmission path between the motor controller 11 and the first motor 12 and the current transmission path between the motor controller 11 and the second motor 13 to drive the first motor 12 and the second motor 13 to operate. At the same time, the control signal of the motor controller 11 can be transmitted to the first motor 12 through the current transmission path between the motor controller 11 and the first motor 12, and can be transmitted to the second motor 13 through the current transmission path between the motor controller 11 and the second motor 13. The operation state signal of the first motor 12 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the first motor 12, and the operation state signal of the second motor 13 can be transmitted to the motor controller 11 through the current transmission path between the motor controller 11 and the second motor 13, so as to realize the motor controller 11 controlling the operation of the first motor 12 and the second motor 13.

[0108] The electric drive device 10 may further include a speed change mechanism. The speed change mechanism is configured to transfer the above mechanical energy to the wheels of the vehicle in a manner of changing the speeds and torques of the first motor 12 and the second motor 13. For example, the speed change mechanism transfers the above mechanical energy to the wheels of the vehicle in a manner of reducing the speeds of the first motor 12 and the second motor 13 and increasing the torques of the first motor 12 and the second motor 13. Another example is that the speed change mechanism transfers the above mechanical energy to the wheels of the vehicle in a manner of increasing the speeds of the first motor 12 and the second motor 13 and reducing the torques of the first motor 12 and the second motor 13. The speed change mechanism may be, but is not limited to, a gear shaft speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, etc.

[0109] To illustrate the technical solutions provided by the present application, the following will be described in detail with reference to specific drawings and embodiments.

[0110] In a first aspect, please refer to Figures 4 to 9 together. An embodiment of the present application provides a motor controller 11, which includes a first power module 111, a bus capacitor 112, and a DC electrical connection component 113. The DC electrical connection component 113 includes a conductive body 1131 and an absorption capacitor 1132. The conductive body 1131 is electrically connected between the first power module 111 and the bus capacitor 112, and the absorption capacitor 1132 is electrically connected to the conductive body 1131.

[0111] The first power module 111 is used to convert the DC current output by the battery 20 into an AC current. The first power module 111 can be, but is not limited to, a silicon carbide power module, an insulated gate bipolar transistor power module (Insulated Gate Bipolar Transistor, IGBT), etc.

[0112] In some embodiments, the motor controller 11 may further include a control module 119. The control module 119 includes a main control unit and a driving unit. The main control unit is the core control component of the motor controller 11 and is used to control the operation of the motor, such as controlling the start and stop, speed, torque, etc. of the motor. The driving unit is electrically connected between the main control unit and the first power module 111, and the driving unit is used to convert the logic signal output by the main control unit into the voltage signal and current signal required to drive the first power module 111. The main control unit and the driving unit can be integrated into one body or can be separately and independently set as two electronic modules.

[0113] In some embodiments, the motor controller 11 may further include a first AC electrical connection component 116. The first AC electrical connection component 116 is a component used to electrically connect the first power module 111 and the motor. The first AC electrical connection component 116 can be, but is not limited to, a copper bar, a wire, etc.

[0114] In some embodiments, the motor controller 11 may further include a bus electrical connection component 115. The bus electrical connection component 115 is electrically connected between the bus capacitor 112 and an external power transmission component (such as a wire harness). The DC current provided by the battery 20 is transmitted to the bus electrical connection component 115 through the external power transmission component to realize the transmission of the DC current to the motor controller 11. The bus electrical connection component 115 can be, but is not limited to, a copper bar, a wire, etc.

[0115] The bus capacitor 112 is used to absorb the high pulse voltage generated during the transmission of the DC current by the bus electrical connection component 115 and the external power transmission component. The bus capacitor 112 can be, but is not limited to, a thin film capacitor, an electrolytic capacitor, an electric double layer capacitor, etc.

[0116] The DC connection component 113 is used to electrically connect the first power module 111 and the bus capacitor 112 to supply DC current to the first power module 111. The DC connection component 113 can be, but is not limited to, a bus bar, a copper bar, a wire, etc. Among them, the conductive body 1131 is the main conductive part of the DC connection component 113, and the conductive body 1131 is used to transmit DC current from the bus capacitor 112 to the first power module 111. The absorption capacitor 1132 is electrically connected to the conductive body 1131, and the absorption capacitor 1132 is used to absorb the high pulse voltage generated by the conductive body 1131 during the transmission of DC current. The absorption capacitor 1132 can be, but is not limited to, a thin film capacitor, an electrolytic capacitor, an electric double layer capacitor, etc. The number of absorption capacitors 1132 can be one or multiple, and can be specifically determined according to actual application requirements.

[0117] In some embodiments, the conductive body 1131 may include a first DC output terminal 11313 and a first DC input terminal 11319. The first power module 111 may include a second DC input terminal 1111, and the bus capacitor 112 may include a third DC output terminal 1121. The first DC input terminal 11319 is electrically connected to the third DC output terminal 1121, and the first DC output terminal 11313 is electrically connected to the second DC input terminal 1111. DC current is transmitted from the third DC output terminal 1121 through the first DC input terminal 11319 to the conductive body 1131, and then from the first DC output terminal 11313 through the second DC input terminal 1111 to the first power module 111.

[0118] In some embodiments, the motor controller 11 may further include an electromagnetic compatibility filter (EMC). The EMC filter may be disposed on the above-mentioned bus electrical connection component 115. The EMC filter is used to reduce or eliminate the electromagnetic waves generated during the transmission of DC current, so as to reduce the interference effect on the first power module 111 and the bus capacitor 112. The EMC filter can be, but is not limited to, a ferrite tube, a ferrite magnetic ring, a magnetic ring choke, etc.

[0119] In the motor controller 11 provided by the embodiment of the present application, by electrically connecting the absorption capacitor 1132 to the conductive body 1131, during the transmission of DC current by the conductive body 1131, the absorption capacitor 1132 can absorb at least part of the high pulse voltage generated by the conductive body 1131, so as to reduce the stray inductance and lead inductance on the conductive body 1131, effectively improving the conductive performance of the DC connection component 113, thereby effectively improving the performance of the motor controller 11, and further effectively improving the performance of the electric drive device 10.

[0120] In some embodiments of the present application, please refer toFigures 4 to 7 The motor controller 11 further includes a housing 118, which is a component for providing an internal installation environment for the motor controller 11. An opening can be provided on the housing 118, and components such as the first power module 111, the bus capacitor 112, and the DC electrical connection assembly 113 can be assembled into the internal installation environment of the motor controller 11 through this opening. The housing 118 can be an integrally formed member or an assembled member assembled from multiple parts. The material of the housing 118 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0121] In some embodiments, at least a part of the space in the internal installation environment of the motor controller 11 constitutes a second cavity 1181, which is used to accommodate components such as the first power module 111 and the DC electrical connection assembly 113. At least another part of the space in the internal installation environment of the motor controller 11 constitutes a third cavity 1182, which is used to accommodate components such as the bus capacitor 112.

[0122] In some embodiments, the motor controller 11 may further include a cover, which is provided on the opening side of the housing 118 to isolate the above internal installation environment from the external environment of the housing 118. The cover can be integrally connected to the housing 118. For example, after the cover is provided on the housing 118, the cover and the housing 118 are welded into a whole. The cover can also be detachably connected to the housing 118. For example, the cover and the housing 118 are connected by fasteners such as bolts and screws. The material of the cover can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0123] In some embodiments of the present application, please refer to Figure 9 、 Figure 12 and Figure 13 together. The conductive body 1131 includes a first electrode member 11311 and a second electrode member 11312 with opposite polarities. The absorption capacitor 1132 includes a first pin 11322 with the same polarity as the first electrode member 11311 and a second pin 11323 with the same polarity as the second electrode member 11312. The first pin 11322 is electrically connected to the first electrode member 11311, and the second pin 11323 is electrically connected to the second electrode member 11312.

[0124] The first electrode member 11311 and the second electrode member 11312 form a conductive body 1131. The opposite polarities of the first electrode member 11311 and the second electrode member 11312 mean that one of the first electrode member 11311 and the second electrode member 11312 is a positive electrode member, and the other of the first electrode member 11311 and the second electrode member 11312 is a negative electrode member. As an example, the first electrode member 11311 is a positive electrode member, the second electrode member 11312 is a negative electrode member, the current input end of the first electrode member 11311 and the current input end of the second electrode member 11312 together form the above-mentioned first DC input terminal 11319, and the current output end of the first electrode member 11311 and the current output end of the second electrode member 11312 together form the above-mentioned first DC output terminal 11313.

[0125] The first pin 11322 and the second pin 11323 are two parts of the absorption capacitor 1132 for electrically connecting to the conductive body 1131. The polarity of the first pin 11322 is the same as that of the first electrode member 11311, and the polarity of the second pin 11323 is the same as that of the second electrode member 11312. As an example, the first electrode member 11311 is a positive electrode member, the first pin 11322 is a positive pin, the second electrode member 11312 is a negative electrode member, and the second pin 11323 is a negative pin. The first pin 11322 can be directly in contact with the first electrode member 11311, or the first pin 11322 can be electrically connected to the first electrode member 11311 through other electrical connection components. The second pin 11323 can be directly in contact with the second electrode member 11312, or the second pin 11323 can be electrically connected to the second electrode member 11312 through other electrical connection components.

[0126] By adopting the above technical solution, it is convenient to electrically connect the conductive body 1131 and the absorption capacitor 1132.

[0127] In some embodiments of the present application, please refer to Figure 9 , the first electrode member 11311 and the second electrode member 11312 are separated and stacked.

[0128] It should be noted that the first electrode member 11311 and the second electrode member 11312 are separated, that is, the first electrode member 11311 and the second electrode member 11312 do not contact each other, so that the first electrode member 11311 and the second electrode member 11312 are insulated from each other.

[0129] In some embodiments, both the first electrode member 11311 and the second electrode member 11312 are in a sheet structure, and the first electrode member 11311 and the second electrode member 11312 are stacked, for example, the DC electrical connection component 113 can be a stacked busbar.

[0130] By adopting the above technical solution, the structure of the DC connection component 113 can be made more compact, effectively improving the utilization rate of the internal space of the motor controller 11, thereby effectively reducing the volume of the motor controller 11, which is beneficial to optimizing the overall layout structure of the electric drive device 10.

[0131] In some embodiments of the present application, please refer to Figure 9 and Figure 13 , the first electrode member 11311 has a first connection surface 11315, the first pin 11322 is connected to the first connection surface 11315, the second electrode member 11312 has a second connection surface 11316, the second pin 11323 is connected to the second connection surface 11316, and the first connection surface 11315 and the second connection surface 11316 are in the same plane.

[0132] The first connection surface 11315 is used to provide space for the first pin 11322 to connect to the first electrode member 11311, and the second connection surface 11316 is used to provide space for the second pin 11323 to connect to the second electrode member 11312. It can be understood that both the first connection surface 11315 and the second connection surface 11316 are planes. The fact that the first connection surface 11315 and the second connection surface 11316 are in the same plane means that the first connection surface 11315 and the second connection surface 11316 are parallel to each other and at the same height position.

[0133] In some embodiments, the absorption capacitor 1132 is a surface-mounted component.

[0134] By adopting the above technical solution, the requirement for flatness of the absorption capacitor 1132 can be met, so that the forces on the first pin 11322 and the second pin 11323 become more balanced, effectively improving the stability of the connection between the absorption capacitor 1132 and the conductive body 1131, thereby effectively improving the working reliability of the DC connection component 113.

[0135] In some embodiments of the present application, please refer to Figure 9 and Figure 13 , the first electrode member 11311 is provided with a first boss 11317, the first connection surface 11315 is arranged on the first boss 11317, the second electrode member 11312 is provided with a second boss 11318, and the second connection surface 11316 is arranged on the second boss 11318.

[0136] In some embodiments, the top of the first boss 11317 and the top of the second boss 11318 are at the same height position. The first connection surface 11315 is disposed on the top of the first boss 11317, and the second connection surface 11316 is disposed on the top of the second boss 11318. That is, the top surfaces of the first boss 11317 and the second boss 11318 are both flat surfaces, and the top surfaces of the first boss 11317 and the second boss 11318 are parallel to each other and at the same height position.

[0137] In some embodiments, the first boss 11317 and the second boss 11318 are adjacently arranged so that the absorption capacitor 1132 is electrically connected to the conductive body 1131.

[0138] By adopting the above technical solution, during the manufacturing process of the conductive body 1131, the heights of the first boss 11317 and the second boss 11318 can be adjusted to achieve the purpose of adjusting the heights of the first connection surface 11315 and the second connection surface 11316, which is convenient for setting the first connection surface 11315 and the second connection surface 11316 on the same plane.

[0139] In some embodiments of the present application, please refer to Figure 19 and Figure 20 , the DC electrical connection component 113 further includes a circuit board 1138, a first conductive terminal 1139a, and a second conductive terminal 1139b. The absorption capacitor 1132 is fixedly disposed on the circuit board 1138. The first conductive terminal 1139a is electrically connected between the first electrode member 11311 and the first pin 11322, and the second conductive terminal 1139b is electrically connected between the second electrode member 11312 and the second pin 11323.

[0140] The circuit board 1138 can be, but is not limited to, a ceramic circuit board 1138, an aluminum substrate, a printed circuit board 1138, a flexible circuit board 1138, etc. The number of the circuit boards 1138 can be one or more. As an example, please refer to Figure 19 , the number of the circuit boards 1138 is one. One absorption capacitor 1132 or multiple absorption capacitors 1132 can be disposed on the circuit board 1138. As an example, please refer to Figure 20 , the number of the circuit boards 1138 is multiple. One absorption capacitor 1132 or multiple absorption capacitors 1132 can be disposed on each circuit board 1138.

[0141] The first conductive terminal 1139a is a component for electrically connecting the first pin 11322 and the first electrode 11311. The number of the first conductive terminals 1139a can be determined according to the number of the absorption capacitors 1132. As an example, the number of the absorption capacitors 1132 and the number of the first conductive terminals 1139a are both multiple, and the multiple first conductive terminals 1139a are arranged in a one-to-one correspondence with the multiple first pins 11322 of the absorption capacitors 1132.

[0142] The second conductive terminal 1139b is a component for electrically connecting the second pin 11323 and the second electrode 11312. The number of the second conductive terminals 1139b can be determined according to the number of the absorption capacitors 1132. As an example, the number of the absorption capacitors 1132 and the number of the second conductive terminals 1139b are both multiple, and the multiple second conductive terminals 1139b are arranged in a one-to-one correspondence with the multiple second pins 11323 of the absorption capacitors 1132.

[0143] In some embodiments, the circuit board 1138 includes a substrate, a first electrical circuit (not shown) and a second electrical circuit (not shown), and the first electrical circuit and the second electrical circuit are both disposed on the substrate. The first pin 11322 is electrically connected to one end of the first electrical circuit, one end of the first conductive terminal 1139a is electrically connected to the other end of the first electrical circuit, and the other end of the first conductive terminal 1139a is electrically connected to the first electrode member 11311, so that the first pin 11322 is electrically connected to the first electrode member 11311. The second pin 11323 is electrically connected to one end of the second electrical circuit, one end of the second conductive terminal 1139b is electrically connected to the other end of the second electrical circuit, and the other end of the second conductive terminal 1139b is electrically connected to the second electrode member 11312, so that the second pin 11323 is electrically connected to the second electrode member 11312.

[0144] By adopting the above technical solution, it is convenient to electrically connect the conductive body 1131 and the absorption capacitor 1132. Moreover, since the circuit board 1138 has good flatness, it can meet the flatness requirement of the absorption capacitor 1132, so that the force on the first pin 11322 and the second pin 11323 becomes more balanced, effectively reducing the risk of short circuit in the electrical connection path between the conductive body 1131 and the absorption capacitor 1132, thereby effectively improving the working reliability of the DC connection component 113.

[0145] In some embodiments of this application, please refer to Figure 9 , Figure 12 and Figure 13 The DC connection assembly 113 further includes an insulating member 1133 , and the insulating member 1133 covers at least a portion of the conductive body 1131 .

[0146] The insulating member 1133 is a component used to insulate and separate the conductive body 1131 from other conductive components. It can be understood that at least part of the first DC input terminal 11319 and at least part of the first DC output terminal 11313 are exposed outside the insulating member 1133 so that the conductive body 1131 is electrically connected to the bus capacitor 112 and the first power module 111.

[0147] In some embodiments, the insulating member 1133 can be integrally formed by an injection molding process. As an example, the insulating member 1133 can be formed on the conductive body 1131 by an injection molding process. As an example, the insulating member 1133 can also be first formed separately by an injection molding process and then assembled with the conductive body 1131.

[0148] In some embodiments, the conductive body 1131 includes a first electrode member 11311 and a second electrode member 11312, and at least part of the insulating member 1133 is disposed between the first electrode member 11311 and the second electrode member 11312 to insulate and separate the first electrode member 11311 from the second electrode member 11312.

[0149] By adopting the above technical solution, the conductive body 1131 can be insulated and separated from other conductive components, effectively reducing the risk of short circuit in the motor controller 11, thereby effectively improving the working reliability of the motor controller 11.

[0150] In some embodiments of the present application, please refer to Figure 10 and Figure 11 , the insulating member 1133 has a first cavity 11333, and the snubber capacitor 1132 is accommodated in the first cavity 11333.

[0151] The number of the first cavities 11333 can be one or more. Each first cavity 11333 can accommodate one snubber capacitor 1132 or multiple snubber capacitors 1132.

[0152] By adopting the above technical solution, not only the position of the snubber capacitor 1132 is effectively restricted, but also the snubber capacitor 1132 can be protected, reducing the risk of collision between the snubber capacitor 1132 and other components, thereby effectively improving the working reliability of the DC electrical connection components.

[0153] In some embodiments of the present application, please refer to Figure 10 and Figure 11 , the insulating member 1133 includes an insulating main body 11331 and a retaining edge 11332. The insulating main body 11331 covers at least part of the conductive body 1131, and the retaining edge 11332 is disposed on the insulating main body 11331 and defines the first cavity 11333.

[0154] The insulating main body 11331 is the main part of the insulating component 1133, and the insulating main body 11331 is used to cover the conductive main body 1131. The retaining edge 11332 is used to define the first cavity 11333. As an example, the retaining edge 11332 can be in a ring structure, and the inner ring space of the retaining edge 11332 forms the first cavity 11333. The insulating main body 11331 and the retaining edge 11332 can be integrally formed. For example, the insulating main body 11331 and the retaining edge 11332 are integrally formed by an injection molding process. The insulating main body 11331 and the retaining edge 11332 can also be separately formed and then connected into a whole. For example, the insulating main body 11331 and the retaining edge 11332 are respectively formed by an injection molding process and then bonded to each other to form a whole.

[0155] By adopting the above technical solution, it is convenient to form the first cavity 11333 on the insulating component 1133.

[0156] In some embodiments of the present application, please refer to Figure 10 and Figure 11 , the insulating component 1133 is provided with a first through hole 11334, and the absorption capacitor 1132 passes through the first through hole 11334 to be electrically connected to the conductive main body 1131.

[0157] In some embodiments, the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 can pass through the same first through hole 11334 to be electrically connected to the conductive main body 1131.

[0158] In some embodiments, the first pin 11322 of the absorption capacitor 1132 can pass through a first through hole 11334 to be electrically connected to the conductive main body 1131, and the second pin 11323 of the absorption capacitor 1132 can pass through another first through hole 11334 to be electrically connected to the conductive main body 1131.

[0159] In some embodiments, the insulating component 1133 includes an insulating main body 11331 and a retaining edge 11332. The insulating main body 11331 covers the conductive main body 1131. The retaining edge 11332 is disposed on the insulating main body 11331 and defines the first cavity 11333. The absorption capacitor 1132 is accommodated in the first cavity 11333. The first through hole 11334 is opened on the insulating main body 11331 and is communicated with the first cavity 11333.

[0160] By adopting the above technical solution, it is convenient for the conductive main body 1131 to be electrically connected to the absorption capacitor 1132.

[0161] In some embodiments of the present application, please refer to Figure 11 , the port edge of the first through hole 11334 far from the conductive main body 1131 has a chamfer structure 11335.

[0162] The chamfer structure 11335 is a guiding structure for guiding the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 into the first via 11334. The chamfer structure 11335 can be, but is not limited to, an inclined chamfer structure 11335, a round chamfer structure 11335, etc.

[0163] During assembly, the first pin 11322 and the second pin 11323 of the absorption capacitor 1132 can enter the first via 11334 along the guidance of the chamfer structure 11335, facilitating the assembly of the absorption capacitor 1132 into the first via 11334 and effectively improving the assembly efficiency of the DC electrical connection component 113.

[0164] In some embodiments of the present application, please refer to Figure 12 and Figure 13 , the absorption capacitor 1132 includes a core body 11321, and the DC electrical connection component 113 further includes a thermal conductive adhesive 1134. The thermal conductive adhesive 1134 coats the core body 11321 and is connected to the conductive body 1131.

[0165] The core body 11321 is the main part of the absorption capacitor 1132, and both the first pin 11322 and the second pin 11323 are electrically connected to the core body 11321.

[0166] The thermal conductive adhesive 1134 is a component for transferring the heat generated by the core body 11321 to the conductive body 1131. The thermal conductive adhesive 1134 can coat only a part of the core body 11321 or can coat the entire core body 11321.

[0167] In some embodiments, the insulating member 1133 includes an insulating main body 11331 and a retaining edge 11332. The insulating main body 11331 coats the conductive body 1131. The retaining edge 11332 is provided on the insulating main body 11331 and defines a first cavity 11333. The absorption capacitor 1132 is accommodated in the first cavity 11333. The insulating main body 11331 is provided with a first via 11334. The absorption capacitor 1132 and the conductive body 1131 are electrically connected through the first via 11334. The thermal conductive adhesive 1134 is potted in the first cavity 11333 to wrap at least part of the core body 11321 and pass through the first via 11334 to be connected to the conductive body 1131, so that the heat generated by the core body 11321 is transferred to the conductive body 1131 through the thermal conductive adhesive 1134.

[0168] By adopting the above technical solution, the heat generated by the core body 11321 can be transferred to the conductive body 1131 through the thermal conductive adhesive 1134, effectively improving the heat dissipation efficiency of the core body 11321 and thus effectively improving the working reliability of the DC electrical connection component 113.

[0169] In some embodiments of the present application, please refer to Figure 14 , Figure 15 , Figure 17 and Figure 18 together. The DC connection component 113 further includes a first heat-conducting member 1135. The first heat-conducting member 1135 includes a first heat-conducting portion 11351 and a second heat-conducting portion 11352 that are heat-conductively connected. The first heat-conducting portion 11351 is heat-conductively connected to the core 11321, and the second heat-conducting portion 11352 is heat-conductively connected to the conductive body 1131.

[0170] The first heat-conducting member 1135 is a component for transferring the heat generated by the core 11321 to the conductive body 1131. Among them, the first heat-conducting portion 11351 is heat-conductively connected to the core 11321. The first heat-conducting portion 11351 may be in direct contact with the core 11321 so that the heat generated by the core 11321 is directly transferred to the first heat-conducting portion 11351. The first heat-conducting portion 11351 may also be connected to the core 11321 through other heat-conducting structures so that the heat generated by the core 11321 is transferred to the first heat-conducting portion 11351 through other heat-conducting structures. The second heat-conducting portion 11352 is heat-conductively connected to the conductive body 1131. The second heat-conducting portion 11352 may be in direct contact with the conductive body 1131 so that the heat in the second heat-conducting portion 11352 is directly transferred to the conductive body 1131. The second heat-conducting portion 11352 may also be connected to the conductive body 1131 through other heat-conducting structures so that the heat in the second heat-conducting portion 11352 is transferred to the conductive body 1131 through other heat-conducting structures.

[0171] In some embodiments, the insulating member 1133 is further provided with a second through hole, and the second heat-conducting portion 11352 passes through the second through hole and is heat-conductively connected to the conductive body 1131.

[0172] The first heat-conducting portion 11351 and the second heat-conducting portion 11352 may be directly connected so that the heat in the first heat-conducting portion 11351 is directly transferred to the second heat-conducting portion 11352. The first heat-conducting portion 11351 and the second heat-conducting portion 11352 may also be connected through other heat-conducting structures so that the heat in the first heat-conducting portion 11351 is transferred to the second heat-conducting portion 11352 through other heat-conducting structures.

[0173] In some embodiments, the first heat-conducting member 1135 further includes a first connecting portion 11353. The first connecting portion 11353 is connected to the insulating member 1133 to fix the first heat-conducting member 1135. The connection manner between the first connecting portion 11353 and the insulating member 1133 may be, but is not limited to, thermal riveting connection, threaded connection, etc.

[0174] In some embodiments, when the number of absorption capacitors 1132 is plural, the first heat conducting member 1135 may also include a plurality of first heat conducting portions 11351, and each first heat conducting portion 11351 is in heat conducting connection with the core 11321 of one absorption capacitor 1132. As an example, the first heat conducting member 1135 includes two first heat conducting portions 11351, and the two first heat conducting portions 11351 are respectively in heat conducting connection with the cores 11321 of two adjacent absorption capacitors 1132.

[0175] By adopting the above technical solution, at least part of the heat generated by the core 11321 can be transferred to the conductive body 1131 through the first heat conducting member 1135, effectively improving the heat dissipation efficiency of the core 11321, and thus effectively improving the working reliability of the DC electrical connection assembly 113.

[0176] In some embodiments of the present application, please refer to Figure 14 and Figure 18 , the DC electrical connection assembly 113 further includes a first insulating heat conducting pad 1136a, and the first insulating heat conducting pad 1136a is disposed between the first heat conducting portion 11351 and the core 11321 to conduct heat connection and insulate and separate the first heat conducting portion 11351 and the core 11321.

[0177] The first insulating heat conducting pad 1136a is a component made of a material with insulating properties and a relatively high heat conduction coefficient.

[0178] In some embodiments, the first heat conducting portion 11351 and the core 11321 can cooperate to clamp the first insulating heat conducting pad 1136a, so that the heat of the core 11321 is transferred to the first heat conducting portion 11351 through the first insulating heat conducting pad 1136a.

[0179] By adopting the above technical solution, it is not only convenient to conduct heat connection between the first heat conducting portion 11351 and the core 11321, but also the risk of short circuit between the first heat conducting portion 11351 and the core 11321 can be reduced, thereby further improving the working reliability of the DC electrical connection assembly 113.

[0180] In some embodiments of the present application, please refer to Figure 14 , Figure 16 , Figure 17 and Figure 18 , the DC electrical connection assembly 113 further includes a second heat conducting member 1137, the second heat conducting member 1137 includes a third heat conducting portion 11371 and a fourth heat conducting portion 11372 that are in heat conducting connection with each other, the first heat conducting portion 11351 is in heat conducting connection with one side of the core 11321, the third heat conducting portion 11371 is in heat conducting connection with the other side of the core 11321, and the fourth heat conducting portion 11372 is in heat conducting connection with the conductive body 1131.

[0181] The second heat conducting member 1137 is a component for transferring the heat generated by the core body 11321 to the conductive main body 1131. Among them, the third heat conducting portion 11371 is in heat conducting connection with the core body 11321. The third heat conducting portion 11371 can be in direct contact with the core body 11321 so that the heat generated by the core body 11321 is directly transferred to the third heat conducting portion 11371. The third heat conducting portion 11371 can also be connected to the core body 11321 through other heat conducting structures so that the heat generated by the core body 11321 is transferred to the third heat conducting portion 11371 through other heat conducting structures. The fourth heat conducting portion 11372 is in heat conducting connection with the conductive main body 1131. The fourth heat conducting portion 11372 can be in direct contact with the conductive main body 1131 so that the heat in the fourth heat conducting portion 11372 is directly transferred to the conductive main body 1131. The fourth heat conducting portion 11372 can also be connected to the conductive main body 1131 through other heat conducting structures so that the heat in the fourth heat conducting portion 11372 is transferred to the conductive main body 1131 through other heat conducting structures.

[0182] The first heat conducting portion 11351 is in heat conducting connection with one side of the core body 11321, and the third heat conducting portion 11371 is in heat conducting connection with the other side of the core body 11321 means that the first heat conducting portion 11351 and the third heat conducting portion 11371 are respectively in heat conducting connection with different parts of the core body 11321. As an example, the first heat conducting portion 11351 is in heat conducting connection with the top of the core body 11321, and the third heat conducting portion 11371 is in heat conducting connection with the side of the core body 11321.

[0183] In some embodiments, the insulating member 1133 is further provided with a third through hole, and the fourth heat conducting portion 11372 passes through the third through hole and is in heat conducting connection with the conductive main body 1131. As an example, the third through hole can communicate with the first through hole 11334. As an example, the third through hole can communicate with the second through hole. As an example, the third through hole can communicate with the first through hole 11334 and the second through hole.

[0184] The third heat conducting portion 11371 and the fourth heat conducting portion 11372 can be directly connected so that the heat in the third heat conducting portion 11371 is directly transferred to the fourth heat conducting portion 11372. The third heat conducting portion 11371 and the fourth heat conducting portion 11372 can also be connected through other heat conducting structures so that the heat in the third heat conducting portion 11371 is transferred to the fourth heat conducting portion 11372 through other heat conducting structures.

[0185] In some embodiments, the second heat conducting member 1137 further includes a second connecting portion 11373, and the second connecting portion 11373 is connected to the insulating member 1133 to fix the second heat conducting member 1137. The connection manner between the second connecting portion 11373 and the insulating member 1133 can be but not limited to thermal riveting connection, threaded connection, etc.

[0186] In some embodiments, when the number of absorption capacitors 1132 is multiple, the second heat conducting member 1137 may also include multiple third heat conducting portions 11371, and each third heat conducting portion 11371 is thermally connected to the core 11321 of one absorption capacitor 1132. As an example, the second heat conducting member 1137 includes two third heat conducting portions 11371, and the two third heat conducting portions 11371 are respectively thermally connected to the cores 11321 of two adjacent absorption capacitors 1132.

[0187] By adopting the above technical solution, at least part of the heat generated by the core 11321 can be transferred to the conductive body 1131 through the first heat conducting member 1135, and at least another part of the heat generated by the core 11321 can be transferred to the conductive body 1131 through the second heat conducting member 1137, further improving the heat dissipation efficiency of the core 11321, thereby further improving the working reliability of the DC electrical connection assembly 113.

[0188] In some embodiments of the present application, please refer to Figure 18 , the DC electrical connection assembly 113 further includes a second insulating heat conducting pad 1136b, and the second insulating heat conducting pad 1136b is disposed between the third heat conducting portion 11371 and the core 11321 to thermally connect and insulate and separate the third heat conducting portion 11371 and the core 11321.

[0189] The second insulating heat conducting pad 1136b is a component made of a material with insulating properties and a relatively high heat conduction coefficient.

[0190] In some embodiments, the third heat conducting portion 11371 and the core 11321 can cooperate to clamp the second insulating heat conducting pad 1136b, so that the heat of the core 11321 is transferred to the third heat conducting portion 11371 through the second insulating heat conducting pad 1136b.

[0191] By adopting the above technical solution, it is not only convenient to thermally connect the third heat conducting portion 11371 and the core 11321, but also the risk of short circuit between the third heat conducting portion 11371 and the core 11321 can be reduced, thereby further improving the working reliability of the DC electrical connection assembly 113.

[0192] In some embodiments of the present application, please refer to Figure 18 , the DC electrical connection assembly 113 further includes a third insulating heat conducting pad 1136c, and the third insulating heat conducting pad 1136c is disposed between the core 11321 and the conductive body 1131 to thermally connect and insulate and separate the core 11321 and the conductive body 1131.

[0193] The third insulating heat conducting pad 1136c is a component made of a material with insulating properties and a relatively high heat conduction coefficient.

[0194] In some embodiments, a first insulating heat-conducting pad 1136a is disposed between the top of the first heat-conducting portion 11351 and the core 11321 to thermally connect the first heat-conducting portion 11351 and the top of the core 11321. A second insulating heat-conducting pad 1136b is disposed between the third heat-conducting portion 11371 and the side of the core 11321 to thermally connect the third heat-conducting portion 11371 and the side of the core 11321. A third insulating heat-conducting pad 1136c is disposed between the bottom of the core 11321 and the conductive body 1131 to thermally connect the bottom of the core 11321 and the conductive body 1131.

[0195] By adopting the above technical solution, at least part of the heat generated by the core 11321 can be transferred to the conductive body 1131 through the third insulating heat-conducting pad 1136c, further improving the heat dissipation efficiency of the core 11321, and reducing the risk of short circuit between the conductive body 1131 and the core 11321, thereby further improving the working reliability of the DC connection assembly 113.

[0196] In some embodiments of the present application, please refer to Figure 5 and Figure 9 simultaneously, the conductive body 1131 includes three-phase first DC output terminals 11313, and each phase of the first DC output terminals 11313 is electrically connected to at least one absorption capacitor 1132.

[0197] In some embodiments, the first power module 111 includes three-phase second DC input terminals 1111, and the three-phase first DC output terminals 11313 and the three-phase second DC input terminals 1111 are arranged in one-to-one correspondence.

[0198] In some embodiments, the number of absorption capacitors 1132 provided on each phase of the first DC output terminals 11313 is the same. As an example, one absorption capacitor 1132 is provided on each phase of the first DC output terminals 11313.

[0199] By adopting the above technical solution, the DC currents output by the three-phase first DC output terminals 11313 can be balanced with each other, thereby further improving the performance of the motor controller 11.

[0200] In some embodiments of the present application, the motor controller 11 further includes a second power module 114. The conductive body 1131 includes a first DC output terminal 11313 and a second DC output terminal 11314. The first DC output terminal 11313 is electrically connected to the first power module 111, and the second DC output terminal 11314 is electrically connected to the second power module 114.

[0201] The second power module 114 is used to convert the direct current output by the battery 20 into alternating current. The second power module 114 can be, but is not limited to, a silicon carbide power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc. It can be understood that the first power module 111 is electrically connected to one motor, and the second power module 114 is electrically connected to another motor.

[0202] In some embodiments, the motor controller 11 may further include a second alternating current connector 117. The second alternating current connector 117 is a component for electrically connecting the second power module 114 and the motor. The second alternating current connector 117 can be, but is not limited to, a copper busbar, a wire, etc.

[0203] In some embodiments, the above drive unit is electrically connected between the main control unit and the first power module 111 and between the main control unit and the second power module 114. The drive unit is used to convert the logic signal output by the main control unit into the voltage signal and current signal required to drive the first power module 111 and the second power module 114.

[0204] In some embodiments, the second power module 114 may include a third DC input terminal 1141. The first DC input terminal 11319 is electrically connected to the third DC output terminal 1121. The first DC output terminal 11313 is electrically connected to the second DC input terminal 1111. The second DC output terminal 11314 is electrically connected to the third DC input terminal 1141. The direct current is transmitted from the third DC output terminal 1121 through the first DC input terminal 11319 to the conductive body 1131, then from the first DC output terminal 11313 through the second DC input terminal 1111 to the first power module 111 and from the second DC output terminal 11314 through the third DC input terminal 1141 to the second power module 114.

[0205] In some embodiments, the conductive body 1131 includes a first electrode member 11311 and a second electrode member 11312 with opposite polarities. The current input ends of the first electrode member 11311 and the second electrode member 11312 together form the above first DC input terminal 11319. One current output end of the first electrode member 11311 and one current output end of the second electrode member 11312 together form the above first DC output terminal 11313. The other current output end of the first electrode member 11311 and the other current output end of the second electrode member 11312 together form the above second DC output terminal 11314.

[0206] By adopting the above technical solution, the first power module 111 and the second power module 114 can share a DC connection component 113, effectively reducing the number of components of the motor controller 11, making the structure of the motor controller 11 more compact, and thus effectively reducing the volume of the motor controller 11.

[0207] In some embodiments of the present application, please refer to Figure 5 and Figure 9 , the conductive body 1131 includes a three-phase first DC output terminal 11313 and a three-phase second DC output terminal 11314. Each first DC output terminal 11313 of each phase is electrically connected to at least one absorption capacitor 1132, and each second DC output terminal 11314 of each phase is electrically connected to at least another absorption capacitor 1132.

[0208] In some embodiments, the first power module 111 includes a three-phase second DC input terminal 1111, and the three-phase first DC output terminals 11313 are arranged in one-to-one correspondence with the three-phase second DC input terminals 1111. The second power module 114 includes a three-phase third DC input terminal 1141, and the three-phase second DC output terminals 11314 are arranged in one-to-one correspondence with the three-phase third DC input terminals 1141.

[0209] In some embodiments, the number of absorption capacitors 1132 provided on each first DC output terminal 11313 of each phase is the same, and the number of absorption capacitors 1132 provided on each second DC output terminal 11314 of each phase is the same. As an example, one absorption capacitor 1132 is provided on each first DC output terminal 11313 of each phase, and one absorption capacitor 1132 is provided on each second DC output terminal 11314 of each phase.

[0210] By adopting the above technical solution, the DC currents output by the three-phase first DC output terminals 11313 and the DC currents output by the three-phase second DC output terminals 11314 can be balanced with each other, thereby further improving the performance of the motor controller 11.

[0211] In some embodiments of the present application, the first power module 111 and the second power module 114 are arranged side by side in the first direction, and the DC connection component 113 is arranged between the first power module 111 and the second power module 114. The first direction is perpendicular to the height direction of the motor controller 11.

[0212] The motor controller 11 has a height direction, a length direction, and a width direction. As an example, the height direction can be Figures 4 to 7 the Z direction shown, and as an example, the length direction can be Figure 4 , Figure 5 and Figure 7 the X direction shown, and as an example, the width direction can beFigure 4 , Figure 5 and Figure 6 the Y direction shown. It should be noted that the dimension of the motor controller 11 in the length direction may be equal to or different from the dimension of the motor controller 11 in the width direction.

[0213] The first direction can be any direction perpendicular to the height direction of the motor controller 11. The first power module 111 and the second power module 114 are arranged side by side in the first direction, which means that the first power module 111 and the second power module 114 are at the same height position, and the projection of the first power module 111 in the height direction of the motor controller 11 does not coincide with the projection of the second power module 114 in the height direction of the motor controller 11. As an example, the first direction is the length direction of the motor controller 11, that is, the first power module 111 and the second power module 114 are arranged side by side in the length direction of the motor controller 11. As an example, the first direction is the width direction of the motor controller 11, that is, the first power module 111 and the second power module 114 are arranged side by side in the width direction of the motor controller 11.

[0214] By adopting the above technical solution, the height dimension of the motor controller 11 is effectively reduced, making the structure of the motor controller 11 more compact, which is beneficial to optimizing the overall layout structure of the electric drive device 10.

[0215] In a second aspect, please refer to Figure 3 , an embodiment of the present application provides an electric drive device 10, including a first motor 12 and the motor controller 11 described in any one of the above embodiments, and the first power module 111 is electrically connected to the first motor 12.

[0216] Since the electric drive device 10 provided by the embodiment of the present application adopts the motor controller 11 described in any one of the above embodiments, the performance of the electric drive device 10 is effectively improved.

[0217] In a third aspect, please refer to Figure 3 , an embodiment of the present application provides an electric drive device 10, including a first motor 12, a second motor 13 and the motor controller 11 described in any one of the above embodiments, the first power module 111 is electrically connected to the first motor 12, and the second power module 114 is electrically connected to the second motor 13.

[0218] Since the electric drive device 10 provided by the embodiment of the present application adopts the motor controller 11 described in any one of the above embodiments, the performance of the electric drive device 10 is effectively improved.

[0219] In a fourth aspect, please refer to Figure 1, an embodiment of the present application provides an electric drive system 1, including a battery 20 and the electric drive device 10 described in any of the above embodiments, and the battery 20 is electrically connected to the electric drive device 10.

[0220] Since the electric drive system 1 provided by the embodiment of the present application adopts the electric drive device 10 described in any of the above embodiments, the performance of the electric drive system 1 is effectively improved.

[0221] In the fifth aspect, please refer to Figure 1 , an embodiment of the present application provides an electric device, including the above electric drive system 1.

[0222] Since the electric device provided by the embodiment of the present application adopts the electric drive system 1 described in any of the above embodiments, the performance of the electric device is effectively improved.

[0223] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor controller, characterized in that: include: a first power module; Bus capacitance; The direct current connection component comprises a conductive body and an absorption capacitor, wherein the conductive body is electrically connected between the first power module and the bus capacitor, and the absorption capacitor is electrically connected to the conductive body.

2. The motor controller according to claim 1, characterized in that: The conductive body includes a first electrode member and a second electrode member with opposite polarities, and the absorption capacitor includes a first pin with the same polarity as the first electrode member and a second pin with the same polarity as the second electrode member, the first pin is electrically connected to the first electrode member, and the second pin is electrically connected to the second electrode member.

3. The motor controller according to claim 2, characterized in that: The first electrode member and the second electrode member are spaced apart and stacked.

4. The motor controller according to claim 2, characterized in that: The first electrode member has a first connection surface, the first pin is connected to the first connection surface, the second electrode member has a second connection surface, the second pin is connected to the second connection surface, and the first connection surface and the second connection surface are on the same plane.

5. The motor controller according to claim 4, characterized in that: The first electrode member is provided with a first boss, and the first connecting surface is arranged on the first boss. The second electrode member is provided with a second boss, and the second connecting surface is arranged on the second boss.

6. The motor controller according to claim 2, characterized in that: The DC connection component also includes a circuit board, a first conductive terminal and a second conductive terminal. The absorption capacitor is fixed on the circuit board. The first conductive terminal is electrically connected between the first electrode member and the first pin, and the second conductive terminal is electrically connected between the second electrode member and the second pin.

7. The motor controller according to claim 1, characterized in that: The DC connection assembly further includes an insulating member, wherein the insulating member covers at least a portion of the conductive body.

8. The motor controller according to claim 7, characterized in that: The insulating member has a first cavity, and the absorption capacitor is accommodated in the first cavity.

9. The motor controller according to claim 8, characterized in that: The insulating member comprises an insulating body and a rib, wherein the insulating body covers at least a portion of the conductive body, and the rib is disposed on the insulating body and defines the first cavity.

10. The motor controller according to claim 7, characterized in that: The insulating member is provided with a first via hole, and the absorption capacitor passes through the first via hole to be electrically connected to the conductive body.

11. The motor controller according to claim 10, characterized in that: The edge of the first via hole away from the conductive body is in a chamfered structure.

12. The motor controller according to claim 1, characterized in that: The absorption capacitor includes a core body, and the DC connection assembly also includes a thermal conductive adhesive, wherein the thermal conductive adhesive covers at least a portion of the core body and is connected to the conductive body.

13. The motor controller according to claim 1, characterized in that: The absorption capacitor includes a core, and the DC connection component also includes a first heat conductive member, the first heat conductive member includes a first heat conductive portion and a second heat conductive portion that are heat conductively connected, the first heat conductive portion is heat conductively connected to the core, and the second heat conductive portion is heat conductively connected to the conductive body.

14. The motor controller according to claim 13, characterized in that: The DC connection assembly further includes a first insulating thermally conductive pad, which is disposed between the first thermally conductive part and the core body to thermally connect the first thermally conductive part and the core body and to insulate and separate them.

15. The motor controller according to claim 13, characterized in that: The DC connection assembly also includes a second heat-conducting member, which includes a third heat-conducting portion and a fourth heat-conducting portion that are thermally connected to each other, the first heat-conducting portion is thermally connected to one side of the core, the third heat-conducting portion is thermally connected to the other side of the core, and the fourth heat-conducting portion is thermally connected to the conductive body.

16. The motor controller according to claim 15, characterized in that: The DC connection assembly further includes a second insulating thermally conductive pad, which is disposed between the third heat conductive portion and the core body to thermally connect the third heat conductive portion and the core body and to insulate and separate them.

17. The motor controller according to claim 13, characterized in that: The DC connection assembly further includes a third insulating thermal pad, which is disposed between the core and the conductive body to thermally connect the core and the conductive body and to insulate and separate them.

18. The motor controller according to any one of claims 1 to 17, characterized in that: The conductive body includes three-phase first DC output terminals, and each phase of the first DC output terminal is electrically connected to at least one of the absorption capacitors.

19. The motor controller according to any one of claims 1 to 17, characterized in that: The motor controller further includes a second power module, the conductive body includes a first DC output terminal and a second DC output terminal, the first DC output terminal is electrically connected to the first power module, and the second DC output terminal is electrically connected to the second power module.

20. The motor controller according to claim 19, characterized in that: The conductive body includes three-phase first DC output terminals and three-phase second DC output terminals, each phase of the first DC output terminal is electrically connected to at least one absorption capacitor, and each phase of the second DC output terminal is electrically connected to at least another absorption capacitor.

21. The motor controller according to claim 19, characterized in that: The first power module and the second power module are arranged side by side along a first direction, the DC connection component is arranged between the first power module and the second power module, and the first direction is perpendicular to the height direction of the motor controller.

22. An electric drive device, characterized in that: The electric drive device includes a first motor and a motor controller as described in any one of claims 1 to 21, and the first power module is electrically connected to the first motor.

23. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor and a motor controller as described in any one of claims 19 to 21, the first power module is electrically connected to the first motor, and the second power module is electrically connected to the second motor.

24. An electric drive system, characterized in that: The electric drive system comprises a battery and the electric drive device as claimed in claim 22 or 23, and the battery is electrically connected to the electric drive device.

25. An electric device, characterized in that: The electric device comprises the electric drive system according to claim 24.

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